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May, 2010:

Electric water heaters: Tempra 12, 15, 20, 24, 36

May 29th, 2010
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In discussing the technology of hot water for domestic and industrial use in the case of short-term consumption of a model used mainly capacitive tankless water heaters with capacity from 10 to 200 liter capacity with long-term use in homes (cottages) – storage water heaters direct and more indirect radiant heating, radiant heating water in industrial quantities – high-speed heat exchangers. Storage water heaters for indirect radiant heating are particularly prevalent.

Coil design, being the most simple from a technological point of view, occupy approximately 80% of the market heat exchangers. They coolant, hot heat source (usually a Tankless water heater), passes through the wall of the coil its energy. Such heat exchangers are used for the past several millennia. Today, the most famous manufacturers (Viessmann, Rielo, De Ditrich), and little known in the world use this design in their equipment.

* Their advantages: simplicity of design
* Low prices
* Ease of maintenance
* The high prevalence

* Their disadvantages: lack of protection from fouling
* The possibility of bacteria in stagnant zones
* Low heat exchange surface
* Length of time of radiant heating water
* Low efficiency due to deposits of scale

PEX Couplings

May 28th, 2010
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PEX couplings are the fittings that are primarily used to make PEX connections. The most common material that is used to manufacture these fittings is brass. Plastic PEX couplings are also used in order to test the pressure. There are several types of couplings that are widely used for various types of PEX installations.

PEX couplings are available in varied sizes in order to facilitate the connection of PEX tubing of different measurements. The most commonly found sizes of the PEX couplings are I inch, 1/2 inch, 3/4 inch and 3/8 inch. These PEX couplings are increasingly used in several heating and plumbing operations. Crimp connections are used to ensure tightly sealed installations. These connections are made using copper crimp rings and various crimp tools to ensure secure connections.

PEX tubing is extremely durable and flexible which can be installed effectively using lesser connections. The PEX piping is widely available in long coils due to which the need for coupling joints do not arise.

Radiant heating + hot water

May 27th, 2010
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All wall-hung Tankless water heaters, just like the interior, are divided into one-and two-circuit. Typically, buying radiant heating Tankless water heater for his country house, its owner, in addition to radiant heating, and wants to have hot water. This can be achieved using a single-circuit or bypass Tankless water heaters. For hot water with the use of single-circuit Tankless water heaters installed Tankless water heater. In bypass wall Tankless water heaters producing hot water is achieved through a secondary flow heat exchanger installed inside the Tankless water heater (as opposed to bypass floor Tankless water heater wall at them – two). Typically, the problem of choosing single-loop or two-circuit of the Tankless water heater can cause some difficulty. Which is the Tankless water heater is preferable?

How much is really necessary?

May 27th, 2010
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Average water consumption in Canada amounts to 280l per day. According to experts, this is wasteful, and without prejudice to compliance with the rules of hygiene can be reduced by half. To fully meet the needs of hot water a day is enough 30-40 liters (5-10l kitchen, shower 15a) per person.
Productivity heater can be calculated by the formula:
Capacity (water temperature 40 ° C) ~ tank capacity * 2 + tank capacity / (radiant heating time / 2).
And the first part of the formula (tank capacity * 2), obtained during the initial flow is fully heated tank to a nominal temperature, and the second one (tank capacity / (radiant heating time / 2)) has time to warm with moderate consumption of hot water.
Approximate formula, as performance depends strongly on the rate of water flow and capacity of the tank.
Example of calculation (capacity = 80l, radiant heating time = 4h).
Capacity (water temperature 40 ° C) ~ 80 * 2 +80 / (4 / 2) = 160 +40 (n / h).

Overview of storage electrical water

May 27th, 2010
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In this article you will learn about features and specifications of  Tankless water heaters are well-known international manufacturers of these products. In contrast to these articles, we have decided to divide the water heater is not on the companies or brands, known in Canada as to price categories that will allow you to compare products of a class and choose the best model, regardless of your opportunities. Typically, in anticipation of buying any questions, any more reliable water heater, a tank should be the tank and what they do differ. In principle, electric water heaters (EVN) are cumulative, and which go beyond the speech, and Flow. The benefits of storage water heaters, or Tankless water heaters, are:
small power (1,5-2,5 kW), which allows you to set them in any room without the reconstruction of the existing wiring;
Simple installation and connection (just plug the tank with a flexible liner and insert the plug into the nearest outlet);
hot water from the Tankless water heater can consume several standpipes points simultaneously;
wide range of models with different levels of service and price.

The disadvantage of accumulating EVN include:

  • limited amount of hot water, which can be spent at one time (depending on the volume of the tank);
  • the need for periodic maintenance (replacing the magnesium anode and cleaning the tank from the scale);
  • dimensions of the tank increases with increasing displacement.

In flow heaters the other way around. Their advantages are:

  • ability to issue an unlimited amount of hot water;
  • ease of maintenance;
  • compactness.

Disadvantages:
high power consumption, which is connected with the need to rebuild local Electrofacilities (and sometimes impossible to install in older homes, wiring which is simply not designed for such loads);
connect only to the soul or cranes (for sale found instantaneous water heaters, designed to connect to two devices, standpipes, but as you know, due to further increase capacity).
Specific power consumption in both species is approximately the same as a cumulative constantly slightly warms the water, and flowing with great power warms only when water consumption.

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